Can you guys . it's a review and i for forgot how to do it. and no, it didn't show me how to do it.

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3