sat writing mc explanations please!

[silverturtle]

<p>

45. It is not uncommon for a great novel to be turned into a mediocre (film, Scott Spencer’s Endless Love is only one case).
    a. film, as was the case of Scott Spencer’s Endless Love
    b. film, in this case Scott Spencer’s Endless Love </p>

<p>the answer is a, and i thought about a, but i picked b instead because i thought that a was wrong because of the tense shift. please explain!

</p>

<p>The tense shift is acceptable because the general trend (and thus present tense) of mediocre films is supported by a specific (past tense) example.</p>