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

In the Mekong Delta, Long Dinh village in Tien Giang province is famous for its traditional craft of weaving sedge mats. The mats' high quality makes them popular domestically, and they are also exported to markets worldwide. In spite of its well-established reputation for this traditional craft, mat weaving only started here some 50 years ago. It was first introduced by immigrants from Kim Son, a famous mat weaving village in Ninh Binh province. However, the technique of weaving sedge mats in Long Dinh, as compared with other places, is somewhat different. Long Dinh branded mats are thicker and have more attractive colors and patterns.

Weaving sedge mats is similar to growing rice. Long Dinh mat production mainly occurs during the dry season, from January to April. Weavers have to work the hardest in May and June; otherwise, when the rainy season starts in July, they will have to put off finishing their products till the next dry season. No matter how much work it requires, Long Dinh mat producers stick with this occupation, as it brings a higher income than growing rice.

This trade provides employment for thousands of local labourers. At present, nearly 1,000 households in Long Dinh village live on weaving mats. To better meet market demands, Long Dinh mat weavers have created many kinds of products besides the traditional sedge mats.

In order to meet market demands, the artisans in Long Dinh village ____.