Which of the following is true regarding a restrictive adjectival clause?
a. it will follow a general noun and is not set off by commas.
b. it will follow a proper noun.
c. it will typically include the relative pronoun which.
d. it will be set off by commas.

The true statement regarding a restrictive adjectival clause is A. It will follow a general noun and is not set off by commas.

A restrictive adjective clause is not set off by commas and should not be omitted from the sentence because its absence will affect the basic meaning of the sentence.

The adjective clause is restrictive because it puts limit to the noun it modifies.

For example:
Students who have young children are invited to use the free daycare center.

Noun - Students
Adjective clause - who have young children (Restrictive because it pertains to students and is not set off by commas).

If the restrictive adjective clause is removed from the sentence then its meaning is different from the original meaning it was intended.

Students are invited to use the free daycare center. (This means that every student can use the free daycare center even if they don't have a child)

Isay answer a hope this !