Question

Which sentence contains an inappropriate shift in verb tense?

Medicine continued to make remarkable advances in the 20th century, as technology entered the operating theater and new antibiotics became available.


Medicine makes remarkable advances in the 20th century, as technology entered the operating theater and new antibiotics become available.


Medicine continues to make remarkable advances as technology enters the operating theater and new antibiotics become available.


Medicine made remarkable advances in the 20th century, as technology entered the operating theater, and new antibiotics became available.


please help I can wait t'ill tommorow but it's already late

Answer 1

Medicine makes remarkable advances in the 20th century, as technology entered the operating theater and new antibiotics become available.

Step-by-step explanation:

I took the test.

Answer 2

B. Medicine makes remarkable advances in the 20th century, as technology entered the operating theater and new antibiotics become available.

Step-by-step explanation:

According to the given option, the sentence that contains an inappropriate shift in verb tense is option B.

This is because there is no concord between the subject and verb(s) as there is both present continuous tense and past tense in the same sentence which makes the verb shift inappropriate.