b. all whole numbers are also rational numbers c. a rational number is always classified as an integer d. Is it integer can also be classified as a rational number

b. True. All whole numbers are also rational numbers. A whole number can be expressed as a fraction with a denominator of 1, for example, 5 can be written as 5/1. c. False. A rational number is not always classified as an integer. A rational number can be a fraction where the numerator and denominator are integers, but the denominator is not necessarily 1. For example, 1/2 is a rational number but not an integer. d. True. An integer can also be classified as a rational number. Integers can be expressed as fractions with a denominator of 1, for example, 3 can be written as 3/1. Since integers are a subset of rational numbers, every integer is also a rational number.