Question: Which of the following is correct? a. A group function can be nested inside a group function. b. A group function can be nested inside

Which of the following is correct?
a. A group function can be nested inside a group function.
b. A group function can be nested inside a single-row function.
c. A single-row function can be nested inside a group function.

d. a and b
e. a, b, and c

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