Answer:
option A is correct
Step-by-step explanation:
" A conditional statement(conditional expression or conditional processing) is a set of rules performed if a certain condition is met. It is sometimes referred to as If-Then statement because if a condition is met, then an action is performed " .
Here the statement is given as:
if we walk home from school it takes 30 minutes.
so the conditional statement here is: " we walk home from school ".
Hence, option A is correct.