Read the following passage and mark the letter A,B,C or D to indicate the correct answer to each of the following questions.

         Do you think you could live in a world with cold weather, dangerous animals, and little daylight? Well, the Inuit have done so for thousands of years. Let’s take a look at how they live their lives.

         The Inuit live in the frozen north of Canada, Russia, and Alaska. In winter, temperatures can be as low as -50°C so it's very difficult for plants to grow. Even in summer it rarely gets above zero. The Inuit people have been living in extreme conditions for centuries, spending their entire lives on the snow that blankets the Arctic.

         The Inuit are short and well-built with almond-shaped eyes and straight black hair. They wear large, thick lined hoods called "parkas" to keep warm during the cold winters. They also wear big boots and furry gloves to protect their hands and feet. The Inuit are cheerful and friendly people who share everything they have with others. Because they live in small groups, they value harmony and frown on arguments and fighting.

         Inuit men are hunters and they spend their days out on the ice looking for whales, seals, and even polar bears to catch and bring back home. In winter they cut holes in the ice and go ice fishing. On winter hunting trips they live in temporary, dome-shaped houses called "igloos" made from blocks of snow. The sole means of transport are dogsleds and snowmobiles to travel the frozen Arctic. Women can also go hunting, but most choose to stay at home and sew, cook, build tents and maintain the children. In order to make the most of the sunlight and warmth the Inuit go to bed very early and get up at 5 a.m to start their working day.

         The Inuit keep their history alive through a tradition of storytelling. The elders teach their children about their history with mythical stories and legends. A popular tradition is the "drum dance" held at births, weddings, and funerals. The whole community gets together and performs songs and dances to the beat of the massive drum.

(Adapted from On Screen B1 Plus by Virginia Evans and Jenny Dooley)

It's impossible for the Inuit to develop cultivation practices because _________.