Which of the following support the argument that light behaves like a particle?

a. sound, which travels in waves, can't travel through a vacuum.
b. interference is observed with light.
c. diffraction is observed with light.
d. unlike sound, light waves don't need a medium to self-propagate

In which situation is the acceleration of a car negative? question 5 options: a)the velocity of a car was 75 km/hr over 4 hours. b)the velocity of a car reduced from 50 km/hr over one minute. c)the velocity of a car increased from 40 km. h to 75 km/h over 15 minutes. d)the velocity of a car was 45 km/hr at 2: 00pm and at 4: 00pm its velocity was 85 km/ht.