Answer: The three sentences which avoided incorrect shifts in verb mood are:
B. Read the stage instructions carefully, and then enact the play.
C. Find Mrs. Lenore, and then ask about her family and health.
E. Cook the chicken for 15 to 20 minutes, and then taste it.
Explanation:
Verb mood can also be known as Verb tense.
An Incorrect shift in a verb mood or verb tense can be defined as the incorrect switch or change from one tense to the other in a written sentence or speech.
For example; an incorrect change from present tense to past tense or past tense to present tense within a sentence.