Which of the following is a guns or butter decision?

 In macroeconomics, the guns versus butter model is an example of a simple production–possibility frontier. It demonstrates the relationship between a nation's investment in defense and civilian goods. The "guns or butter" model is used generally as a simplification of national spending as a part of GDP

Explanation:  tbh google

a. the moon was locked into orbit by the earths gravity as it was passing by and capture hypothesis i think