After the failed Beer Hall Putsch, Adolph Hitler decided to a. attempt to come to power through constitutional means. b. move back to Austria, where he had influential friends and contacts. c. overthrow the Weimar government by force, using his SA (Sturmabteilung). d. drop out of public sight and wait for something to happen. e. use the SS (Schutzstaffel) to infiltrate the German army, and have the army depose the Weimar government.

a. attempt to come to power through constitutional means

Explanation:

After the failed Beer Hall Putsch, Adolph Hitler decided to attempt to come to power through constitutional means.

Adolf Hitler and his followers staged the Beer Hall Putsch in Munich,he attempted to seize power in a failed coup and was imprisoned for treason .

After been released after his five year sentence, he focus his attempt of obtaining power through constitutional means(legal) rather than his previous attempt through revolution.

. austria-hungary began seizing british colonies in africa.

good question. i'll be looking into that. (this is a joke sir)