The Canal was regarded as “The lifeline of the Empire” because it allowed for quick and easy access to the British colonies in Asia and Africa
For the answer to the question above.
The best answer I can give is letter B.
During the civil war, there was also a competition in the global market on the supply of cotton so Europe sought other suppliers from India and Egypt and this is why the price is down after 1865
An electronic calendar would be an example of software. The remaining things which you've mentioned in your questions would be examples of peripheral devices (so mouse, scanner, and monitor :)).
The phone number that helps the people is 2028336130