If B={3,6,9,12,15,18,21} C={3,6,9,12,15,18,21} and D={6,12,18,24} . What is B-C-D

I take B - C - D to mean (B - C ) - D, i.e. all elements of B - C not in D, or all elements in B not in C and not in D.

The given sets B and C are identical, so

B = {3, 6, 9, 12, 15, 18, 21}

C = {3, 6, 9, 12, 15, 18, 21}

===>   B - C = { }

Then

(B - C ) - D = { } - D = { } (empty set)

answer: c

step-by-step explanation: because you don't have to draw a point of intersection. couldyou give me brainliest?

u

step-by-step explanation:

i have done this all on a piece of paper but idk how to put it on here cuz it needs to be drawn