Why does the redshift seen in the spectral lines from other galaxies support the big bang theory? o a. it is proof that energy and matter are quantized. o b. it is evidence that the universe is expanding. o c. it indicates that there is a lot of helium in the universe. o d. it shows that lengths contract as velocities near the speed of light.

Which of the following statements is true about women and minorities in early psychology? a. in the early 20th century, numerous graduate schools recruited women and minorities to study psychology. b. opportunities in higher education were limited for women and minorities in the early 20th century due to discrimination. c. despite some obstacles, there were numerous employment opportunities for women and minorities. d. women and minorities were often selected to do academic research in an effort to make the field more diverse.

With i really need the correct answer!

What are similarities and differences between refraction, reflection, diffraction and absorption?