Concept:The sentence is in past tense, so the verb must also be in past tense to maintain grammatical consistency.
Explanation:The main clause "They were informed" establishes a past time frame.
The blank must be filled with a past‑tense verb that matches the subject "the inaugural version of the scheme".
"Had" is the past tense of "have" and correctly indicates possession or composition (three parts).
Option A ("had three parts") is therefore correct.
Option B ("was three parts") uses "was", which is the past tense of "is". "Was" describes a state or identity, not possession; the scheme is not "three parts" in the sense of being equal to them.
Option C ("have three parts") uses present tense "have", which conflicts with the past‑tense "were informed".
Option D ("had has three parts") is redundant and ungrammatical because "had" and "has" cannot be used together; "has" is present tense and creates a tense mismatch.
Thus, only option A correctly uses past tense and fits the sentence.
Answer:A. had three parts.