Please Help | SAT Writing Question from the Online Course

Test Preparation SAT Preparation
1

In the past, many famous painters meticulously ground their own colors, an attention to detail that is noteworthy.

a. an attention to detail that is noteworthy
b. an idea that is noteworthy in showing their attention to detail.

Why the answer is a? I can’t understand.
Thanks.

2

bump

3

grinding colors isn’t “an idea,” so (B) presents a modifier error. It also violates a style imperative–never choose answers that rely on gerunds when answers featuring regular nouns are available. @MojoShab

4

thanks man