Pick the sentence that correctly uses grammar. a. The computer corrected oneself and continued to run the program.
b. The computer corrects itself and continued to run the program.
c. The computer corrected itself and continued to run the program.
d. none of the above

B

Explanation:

NONE

D. 3 - 6 month

Explanation:

As indicated in the table, the environment to be cleaned is "ground floor" (row 10). As the question ask about the normal cleaning schedule for the ground floor, so check the Column 2 for Normal Cleaning Frequency, which shows that "3-6 months". So that, D is the answer - the ground floors of office building normally cleaned from 3 to 6 months.