The logical operator works best when testing a number to determine if it

is within a range.

&& AND

Explanation:

 The logical AND operator works good during a testing the number for determining whether the given number is within the range. The && is the type of the Boolean operator and it is generally known as AND logical operator.

The given logical operator value is TRUE when both the operand in the Boolean value are true and otherwise it return FALSE. The AND logical operator value contain associativity from the left to right.

In the logical AND (&&) operator the given condition become TRUE when both operand in the logical operator are the non zero value.

answer; i believe the correct answer is (a) all trenches must have access/egress;

i think its c but i'm not