Plz answer it..pz

Write the equation for momentum, first using symbols for the variables, then using words for the variables.

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

Which one of the following research methods can show cause and effect