What was one significant and immediate cause of the Six-Day War, also known as the June War?

AEgypt and Syria launched surprise attacks on the holy day of Yom Kippur.
BArab nationalist groups from Lebanon, Syria, and Jordan began to attack Israel.
CIsrael invaded and captured most Egyptian territory outside of Africa.
DIsrael launched a preemptive attack on the Syrian capital of Damascus.

Verified Answer :

Hagrid

The one significant and immediate cause of the Six-Day War
was when Israel invaded and captured most Egyptian territory outside of Africa.
The Israeli air forces have entered into the Egyptian airspace attacking the
military bases. The Israelis managed to obliterate the Egyptian air force. 

Answer:Arab nationalist groups from Lebanon, Syria, and Jordan began to attack Israel.

Explanation:AP3X said it was right