The Mayor of Vargonia came under flak recently because he cancelled several pre-sanctioned infrastructure development projects. The opposition is claiming that this was a move to persecute them, as more than 90% of the cancelled projects were in constituencies ruled by opposition party members. The Mayor has responded that all the cancelled projects were evaluated and deemed unfeasible in a study conducted by an independent third party. Therefore, his supporters claim that his motivation has been purely non-partisan.
Which of the following is an assumption that the Mayor’s supporters rely on?

1. If he wanted to, the Mayor can persecute opposition party members in ways other than by cancelling infrastructure projects.
2. The infrastructure projects identified by the study as unfeasible were not mostly in constituencies controlled by the Mayors party.
3. The canceled projects formed a significant proportion of all the infrastructure projects that were to be undertaken by the government in the near future.
4. The infrastructure projects planned for constituencies controlled by the Mayors party were all deemed feasible in the independent study.
5. Opposition parties also use studies conducted by independent third parties to objectively assess government projects.

I selected option d but ans says b.

My reasoning :

option 1 : not related. Out of scope

option 2 : Already been stated in the question itself therefore it cannot be the assumption

option 3 : I thought this one but on negation, it does not break the conclusion therefore eliminated

option 5 : not relevant

Although not satisfied much, I marked this option since rest others were already eliminated.

Experts please help me out