B. But he stepped out briskly breathing deeply of the cold air
Answer:
Even though the possible options for revisions were not posted in your question, I believe the best way to correct the sentence is:
Because they were relieved to have survived the arduous journey along the rugged frontier, many settlers were known to kiss the ground upon finally arriving at their destination.
Explanation:
The original sentence did not present a comma between the dependent clause and the independent one. That would have been right if the dependent clause had come after the independent one. That would have been the natural structural order for the sentence. However, that is not the case. The sentence began with the dependent clause - which can be identified by the subordinating conjunction "because". While the normal structure would be "A happened because of B", what we have in this sentence is "because of B, A happened". When we invert the sequence, we should use a comma to separate the clauses. For that reason, the best way to correct the sentence is by adding a comma between the words "frontier" and "many":
Because they were relieved to have survived the arduous journey along the rugged frontier, many settlers were known to kiss the ground upon finally arriving at their destination.
I am very happy for you. You have done extremely well in your board examination. Your hard work has been rewarded.
Today you are standing at the threshold of your career. You have to take the right decision. Do not take up any stream blindly simply because of your friends or family pressure. Choose the stream of your own interest.
Since you are good in mathematics, I would advise you to take up science stream. This is my personal opinion. The final decision will be yours. Do inform me about your decision.
With love and affection,
Your brother