Until recently, the inuit people led a nomadic existence, sheltering in igloos, the ice-block domes that are peculiar to north-central canada, and in structures made of stones, bones, driftwood, and skins.
a. until recently, the inuit people led a nomadic existence, sheltering
b. during recent times, the inuit people lead a nomadic existence, sheltering
c. in the times that are recent, the inuit people led a nomadic existence, sheltered
d. up until recently, the inuit people, leading a nomadic existence, have sheltered
e. until recent times, leading a nomadic existence, the inuit people were sheltered

A. Until recently, the Inuit people led a nomadic existence, sheltering

Explanation:

According to my research on grammatically correct sentences, I can say that based on the information provided within the question the correct version would be "Until recently, the Inuit people led a nomadic existence, sheltering". None of the other sentences are grammatically correct either alone or when combined with the next section of the statement.

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its many islands, high mountains, and remote peninsulas isolated population centers.

answer: this is because archeologists keep finding artefacts and ancient ruins dated more than 10000 to 15000 years, date around scientists said humans discovered language; which is at least mysterious as scientists always have said that is necessary to have a language to have architecture and some basic maths.

explanation: brainlest