Which of the following is not a guideline used in determining the correct tense
for a verb?
A. Shift tense in order to indicate a change in time frame from one
action to another
B. When writing a paragraph or an essay, set a primary tense and use
occasional shifts to other tenses to indicate changes in time frame
C. Don't shift from one tense to another if the time frame for two
actions is the same
D. Shift between past and present tense as often as necessary when
writing about literature, but do not use the future tense