Which of the following technological developments first allowed humans to successfully travel to outer space and back

No options were given however, to my knowledge, the first was the hot air balloon.

what are the options

Explanation:

i need help on it too

the endomembrane system is a series of compartments that work together to package, label, and ship proteins and molecules. in your cells, the endomembrane system is made up of both the endoplasmic reticulum and the golgi apparatus. these compartments are folds of membranes that form tubes and sacs in your cells.

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