B is correct. B has (three seven)[37] and (one two)[12]. The seven isn't plural for 777 in A and C. There aren't any commas between the either set of numbers so we should treat them the same eliminating the difference in use of (three seven)[37] and (one two)[2] for answer D

Both B and D are correct. Neither A or C are correct because seven is singular in the question.

A: Three sevens and one two

B: Three sevens, one, and two

C: Three, seven, one, and two

D: Three, seven, and one two

Oh its d.

It has 3, 7, and one (singular) 2.

This is why commas are important

yes

Ok, so we can easily boil it down to B and D since they said “three seven” and not three sevens. So the first part is easily [37]

The tricky part is the “and one two” you’d think they mean twelve, but the key part is the and. In proper mathematics that means a decimal point, however in many dialects the “and” is commonly used as a final number to be said like a list, so if you wanted to include both a one and a two you’d have to put and between one and two, however since the and was before the one that means the one isn’t a number but rather it means there’s a singular [2].

So the answer is D. 372