Please help me, thanks in advance :)

So, if one U.S dollar is equal to 6 Argentine pesos, then for every 6 pesos, you have one u.s. dollar and for every one u.s. dollar you have 6 pesos.
So, multiply 25*6 to get your answer.
25*6=150
So, $25 U.S. is equal to $150 Argentine pesos.
A is your answer. Hope this helps!! Have a great day!!!