Multiple choice

Artificial satellites are used for which of the following reasons? a. Space researchb. Reflecting radio and telephone wavesc. Navigation of ships and air craftsd. Weather forecasting

  1. Only a and b

  2. Only a, b and c

  3. Only a and d

  4. All of these

  5. Only a

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer. All these are correct usages of artificial satellites.