Which type of signal do you think is more exact and precise representation of its source

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.

The softest and hardest minerals are: softest hardest

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?