For want of adequate funds, non-plan expenditure has been further pruned on this year's budget.

Answer: Option C

Prolonged : continuing for a long time or longer than usual; lengthy.
Expanded : being or having been enlarged or extended.
Reduced : make smaller or less in amount, degree, or size.
Included : contained as part of a whole being considered.
Pruned : reduce the extent of (something) by removing superfluous or unwanted parts.

Synonym of Pruned is Reduced