According to paragraph 4,

✂️ a) the same amount of cargo is towed by as many tugboats as it was in the past.

✂️ b) the larger ships mean that more tugboats will be necessary to tow the same amount of cargo.

✂️ c) tugboats spend more and more time on sea.

✂️ d) tugboats take long hours to leave port.

✂️ e) a ship can take as much cargo as a truck.

Responda: According to paragraph 4,