The primary catalyst
The primary catalyst fueling the rapid spread of wind farms across the country – from offshore platforms along the coasts through the vast deserts and plains – has been a combination of federal tax incentives and state mandates requiring utilities to raise renewable power to increasing percentages of their overall energy production.
(A) has been a combination of federal tax incentives and state mandates requiring utilities to raise renewable power to increasing percentages of their
(B) have been combinations of federal tax incentives and state mandates requiring utilities to raise renewable power to increasing percentages of their
(C) has been a combination of federal tax incentives and state mandates that require utilities to raise renewable power to an increasing percentage of its
(D) have been a combination of federal tax incentives and state mandates that require utilities to raise renewable power to increasing percentages of their
(E) has been a combination of federal tax incentives and of state mandates requiring utilities to raise renewable power to increasing percentages of its
Hi Riya,
The subjunctive in general is a verb form used to indicate that one person wants another person to do something
Example verbs: advise prefer request suggest
ask demand order propose require urge
command insist recommend stipulate
Structure to be followed for subjunctive: subject + subjunctive verb (any tense) + that + subject + verb in simple form
I recommend that he practice more
I insist that you stay for dinner
In your sentence above, “state mandates” is a noun. The subjunctive rule does not apply here
