What is the difference between multiplying/dividing integers and multiplying/dividing rational numbers?

a: The same rules for signs of integers are applied to rational numbers.

b: Multiplying rational numbers is the same as multiplying integers but dividing rational numbers is different from dividing integers.

c: Dividing rational numbers is the same as dividing integers but multiplying rational numbers is different from multiplying integers.

d: Multiplying and dividing rational numbers is similar to multiplying and dividing integers because you always multiply and divide the larger number by the smaller number.