Which actions directly contributed to the United States entering World War I? Select two options.

1)Germany sank US ships.
2)Germany expanded its colonial empire.
3)Germany sent the Zimmermann Telegram.
4)Germany attacked US territory.
5)Germany signed a treaty with Austria-Hungary.

1 and 3.

Explanation:

Germany was sinking ships while the U.S was supplying countries like England with food and weapons to cut off enemy supply lines, and then England intercepted the Zimmermann Telegram from Germany, which was a message Germany tried to send Mexico to convince Mexico to invade the United States. After England showed the U.S the telegram, they got upset and decided that was the last straw and finally declared war on Germany.

i think it would be c.

hope i'm correct

explanation:

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.