Many activists agree that the solution can be achieved
through education (Dale 130) and that the responsibility
lies not with schools but with parents.
What mistake did the author make in using an in-text citation?
O
A. Using parenthesis rather than quotation marks
O
B. Inserting the parenthetical citation in the wrong place
O
C. Including the last name of the source but not his first name
O
D. Not including the year of publication

I am sorry, but they all are poor. I have used numbered references for a very long time.

Explanation:

answer: group ii. when the root is a full word except for a final e, the forms usually are spelled with -able.

explanation: the word will be deplorable. -able will be used with the word 'deplore-'. the group ii is when the root is a full word except for a final e, the forms usually are spelled with -able is used for the word deplore- because the word deplore- has 'e' at the end of it.