I wanna say both A and D but its most likely A.
omg! tysm this really helps me :)
Explanation:
The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.
for example:: if we have to find the cost of 1oo pen the first we will find the cost of 1 pen and we will multiply it by 1oo to get the cost of 100 pens
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