Question

Writers editing sentences for errors in grammar and usage would look for

Answer 1

When a writer edits his/her own work, all four errors in grammar and usage listed above, need to be looked for.
a. Ways to replace overused words.  A paragraph sounds clumsy when the same words are used too many times in a sentence/paragraph
b. Problems with verb tenses. It is very important to use the same verb tense throughout your written work. 
c. Sentences missing commas and periods. If a sentence does not contain commas and periods, it is confusing and ends up being a jumble of words. 
d. Misused or missing capitalization.

Answer 2

ANSWER: B. problems with verb tenses

When editing for errors in grammar and usage, a writer should primarily look at the grammatical structure of the sentences and any possible mistakes in the way some of the words are used.

Among the options, only choice B is about a grammar issue. The rest of the options are all about technicalities that do not concern grammar.