(A) Although the strike of transporters continues, I shall come.
(B) I shall come if the strikes of transporters continues.
(C) Even though I come, the strike of transporters is going to continue.

Sentence A: The strike is ongoing, and despite this, the speaker will come. The speaker’s decision to come is definite and not conditional on the strike ending.

Sentence B: The speaker will come only if the strike continues. This is a conditional statement: if the strike stops, the speaker will not come.

Sentence C: Regardless of whether the speaker comes, the strike will continue.

As we can see all three sentences carry a different core message. 

Therefore, Option D is the correct answer.