Choose the grammatically correct sentence(s). * a. the shear cost of hospital-acquired infections is enough to warrant a solution. b. the sheer cost of hospital-acquired infections is enough to warrant a solution. c. the high cost of hospital-acquired infections is enough to warrant a solution. d. the high cost, of hospital-acquired infections, is enough to warrant a solution. e. both b and c are correct. f. none of the above are correct.

E. Both B and C are correct.

Explanation:

Sentences B and C are the correct sentences.

B. The sheer cost of hospital-acquired infections is enough to warrant a solution.

C. The high cost of hospital-acquired infections is enough to warrant a solution.

The use of punctuation marks, the spellings make them the right choice. Also, the words "sheer" and "high" are similar in the sense that "sheer" is an adjective that means extreme.

However, the other two options of A and D are wrong for-

1. the spelling of sheer is wrong in option A. (shear)

2. the position of the commas (,) in the sentence (cost, infections,) are wrong.

in that passage i would say the sentence which best describes the overall impact of the setting is when they mention the absence of people because it suggests that taking a walk at night is unusual.