The following sentences form an essay. Proofread them for consistency, parallelism, and concise language. Select the letter of the error in each sentence. High blood pressure can also force small blood vessels to burst like an overstressed garden hose. If that happens in the brain, that malfunction is called a stroke ⎯ the other major cardiovascular killer besides heart attacks, which many people die from as well.

A) consistency
B) parallelism
C) concise language

Select the correct noun for each blank. The ____ ran a series of tests to confirm that the new chemical plant meets environmental codes.

A) inspector generals
B) inspectors general

Select the part of the sentence that contains a grammar or punctuation error. Some believe that a vegetarian diet provides health benefits, still others want to demonstrate their concern for world hunger and the environment.

A) believe that
B) provides
C) benefits, still

In each sentence below, a blank space appears where the verb should be. Choose the correct helping verb and past participle form. Select the letter of the correct answer. Professors Smithson and Knoll ____ on math anxiety at three different colleges this year.

A) have speak
B) have spoken
C) has spoken