Reading Comprehension - WTO Definitions of Developed and Developing Countries

Read the following passage and answer the question that follows.

There are no World Trade Organisation (WTO) definitions of "developed" and "developing" countries. Members announce for themselves whether they are "developed" or "developing" countries. However, other members can challenge the decision of a member to make use of provisions available to developing countries. Developing country status in the WTO brings certain rights. There are for example provisions in some WTO Agreements which provide developing countries with longer transaction periods before they are required to fully implement the agreement and developing countries can receive technical assistance. That a WTO member announces itself as a developing country does not automatically mean that it will benefit from the unilateral preference schemes of some of the developed country members such as the Generalized System of Preferences (GSP). In practice, it is the preference giving country which decides the list of developing countries.

Who can change the decision of a country to make use of provisions available to developing countries ?

Who decides whether one country is developing or developed ?

Why would a country like to announce itself as a developing country ?