Hindmost : furthest back, latest or ultramodern. Disposed : inclined or willing. Mature : fully developed physically, full-grown. Premature : occurring or done before the usual or proper time, too early. Unimportant : lacking in importance or significance. Foremost : most prominent in rank, importance, or position.
Defends: protect from harm or danger. Deprives: prevent (a person or place) from having or using something Devises: plan or invent (a complex procedure, system, or mechanism) by careful thought Secures: fix or attach (something) firmly so that it cannot be moved or lost Deserts: to abandon that is to stop supporting or looking after Protects: keep safe from harm
Soothing: having a gently calming effect. Frightening, Scaring and Horrible are having similar meaning as Terrible. Delectable: delicious or humorous extremely attractive.
So opposite of Terrible is soothing.
Succinctly: briefly and clearly expressed. Limitedly: restricted in size, amount, or extent;narrow. Spaciously and Broad based are similar to Widely and mean far apart, with a wide space or interval between. Narrowly: only just, by only a small margin.
So, correct opposite is Narrowly.option D is also correct.