Please help ASAP WILL MARK THE BRAINLEST

What is the acceleration of a bicycle if the bicycle plus the rider have a mass of 50 Kg and the net force on the bicycle is 250 N?

A) 7 m/s2

B) 3 m/s2

C) 5 m/s2

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided