Help plz!! Which of the following statements about rational numbers is not correct? A) All whole numbers are also rational numbers.
B) All rational numbers can be written in the form a/b, where b ≠ 0.
C) Rational numbers cannot be negative.
D) All integers are also rational numbers.

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point