When was the first Atlantic cable laid

1955

Explanation:

TAT-1 (Transatlantic No. 1) was the first transatlantic telephone cable system. It was laid between Gallanach Bay, near Oban, Scotland and Clarenville, Newfoundland between 1955 and 1956 by the cable ship Monarch. It was inaugurated on September 25, 1956, initially carrying 36 telephone channels.

1955

Explanation:

it was inaugurated on September 25, 1956, initially carrying 36 telephone channels, the name was TAT 1  (Transatlantic No. 1), it was was the first transatlantic telephone cable system It was laid between Gallanach Bay, near Oban, Scotland and Clarenville, Newfoundland between 1955 and 1956 by the cable ship Monarch

the right answer is the constitution