What is the correct reason for blinking / flickering of stars? Explain it. A) The blasts in the stars.

B) Absorption of star light by the atmosphere.

C) Motion of the stars.

D) Changing refractive index of gases in the atmosphere.
plz suggest me a answer which can give me 3 marks​

Acurve connects the data points that are plotted. (physical science chapter 11 motion)

Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.