How to figure out causative verb???

usually causative verb are following by an object and then the base from of a verb than explains what the object did, but there are times when the word 'to' precedes the base from of the verb or when the past participle from of the verb is used.

we know that, volume of a rectangular prism is given by :

✿   {length × width × height}

given : the length of rectangular prism = 5.5

given : the width of rectangular prism = 6

given : the height of rectangular prism = 3

⇒ the volume of given rectangular prism = {5.5 × 6 × 3}

⇒ the volume of given rectangular prism = 99

i think the answer is either c or d

im thinking d might make more sense though

sorry if im wrong