Okies Mr. Curly,
Here's your answer.
The choices we are dealing herewith are all horrible.
However having said that this question has still to be answered.
My vote is for D.
Reasons:
1. The sentence is of type Subjunctive.
Whenver you see words like mandate, demand, insist, recommend, request, require, etc. the sentence is of type subjunctive.
In a subjunctive sentence the verb is always of a form "be". For example, verbs like "is", "are", etc will appear as "be" or in short you shall have verbs in thier base form.
eg:- His requirement is that everyone
is computer literate. -
Wrong.
His requirment is that everyone
be computer literate. -
Correct.
So having said that, only choices A and D remain.
D is my opinion is not a run-on as you think.
The reason being, Choice A simply suggests that School board ruling ............... assures Children have a
reading problem of special aid.
Remember??? Know your relative pronouns
While Choice D clearly conveys that....
School board ruling ................. assures
children with reading problems of a special aid.
HTH