Error in the ultimate guide to new SAT grammar by Erica L. Meltzer

I found question 5.1 answer wrong on page 88.

The geologic instability known as the Pacific Ring of Fire has produced numerous faults. They cause approximately 10,000 earthquakes annually. Rough…

“faults. They” is underlined.

Which is NOT an acceptable alternative?

A, faults, they cause
B, faults; they cause
C, faults that cause
D, faults, which cause

The answer from the book is D, but I get A.

I found A the correct option after examine it many times?

Is it me wrong, or the book?
If I am wrong, what is the grammar error for D, and why is A grammatically correct?

A is correct - it’s a run-on sentence.

So I am correct, but that makes the book incorrect… I am doubting if the ultimate guide to new SAT grammar is a legit book not…

My S2 found two mistakes in the Barron’s New SAT review book practice tests, one in the answer section for reading and the other in math. I think he benefitted from the book, though.

Confirming your finding & MaineLonghorn’s: “A” is a run-together sentence (two independent clauses with a non-contiguous subject, joined by a comma splice).

Erica is aware of the typo and will be correcting it! Good catch! By the way, her book is actually probably the best out there.

There are typos in almost every SAT and ACT preparation book, including most of the Official Guides. The difference between the good authors and the bad ones is that the good ones are open to input/corrections and fix errors frequently. Erica is one of the good ones.

…but if you want the author to fix it, then you should also try to contact the author directly instead of just posting on CC.

For what it’s worth, grammar makes up a very low percentage of the new SAT. Much less important than it used to be.

^That’s not true. Grammar does represent a pretty sizable chunk of the test. Not as much as Math or Reading, but still pretty significant.

If you look at the test based on the number of questions, Writing represents 29% of the test (44 out of 154).

If you look at the minutes allocated to each section, Writing represents 19% of the total minutes (35 out or 180).

Grammar does not make up a very low percentage of the new SAT.

Some of the questions on the writing part are not even grammar questions. The new sat grammar is a lot easier than the old sat grammar