Gigantic passenger planes currently being developed will have enough

Gigantic passenger planes currently being developed will have enough space to hold shops and lounges in addition to passenger seating(FACT)
. However, the additional space will more likely be used for more passenger seating. (AUTHOR'S CLAIM)
The number of passengers flying the air-traffic system is expected to triple within 20 years, and it will be impossible for airports to accommodate enough normal-sized jet planes to carry that many passengers.(SUPPORT FOR AUTHOR 'S CLAIM)

Which one of the following most accurately states the conclusion drawn in the argument?
- the question asks for a conclusion , the main point why the author is writting this argument.

FIrst he presents a fact - " enough space to hold shops"
then he says " however the additional space (for shops) will be used for passenger more"- THIS HIS CLAIM
then he supports his point by giving facts about the current ability of airlines and future ability.

(A) Gigantic planes currently being developed will have enough space in them to hold shops and lounges as well as passenger seating.- this is a fact

(B) The additional space in the gigantic planes currently being developed is more likely to be filled with passenger seating than with shops and lounges- the main reason why author mkes his argument
.
(C) The number of passengers flying the air-traffic system is expected to triple within 20 years.- FACT to support main idea

(D) In 20 years, it will be impossible for airports to accommodate enough normal-sized planes to carry the number of passengers that are expected to be flying then.- FACT TO SUPPORT MAIN IDEA/ CLAIM

(E) In 20 years, most airline passengers will be flying in gigantic passenger planes.- "most " screws this AC