PLZ HELP WILL MARK BRAINLEST Which architectural design was used in Mayan civilizations to study astronomy? Group of answer choices

Calendars

Observatories

Stelae

Obelisks

What initiatives were taken by americans to benefit the war effort? 1. americans planted home gardens to ration food for the troops. 2.american charities were established to provide aid to factory workers. 3.american companies joined together to make products more cheaply. 4.americans created clubs for promoting weapons to be used in the war.

What kind of relationship did the soviet union have with the united states in 1945

Which areas where seperated by the iron curtain