$```$

$""$ "Module for simple mathematical calculations"""

class calculate:

$"""$Implements simple maths functions"""

def add$($num$1,$ num$2)$:

$"""$Add two numbers"""

a$=$num$1+$num$2$

# print the result

print$(\text{'}$Result is $\text{'},$a$)$

$```$

What does line $7$ represent?

ACode comment

BModule docstring

CClass docstring

DFunction docstring