f.1 math

plz help me to do the question.If you do not know the answer,plz answer no!Thx!


1.Which of the following is/are true?
(1)For any two numbers on a number line,the one on the left is always smaller than the one on the right.
(2)A positive number multiplied by a negative number has the same sign as a negative number multiplied by a positive number.
(3)0 is a positive number.

A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. all of the above