Using the matrices below, determine if the product of BA is defined if define status dimensions.
a.) not defined
b.) defined 2 x 4
c.) defined 4 x 2
d.) defined 3 x 4

i dont understand your question

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.

we can't see all full 4 options, but if this is the full option, than the very left one is correct:

-2/5 * -3 3/4

remake the question, adding a picture of all the question, or write down the full left and right answers.