You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Kenya

Context:
East and Central Africa's biggest economy has posted tremendous growth in the service sector, boosted by rapid expansion in telecommunication and financial activity over the last decade, and now[when?] contributes 62% of GDP. 22% of GDP still comes from the unreliable agricultural sector which employs 75% of the labour force (a consistent characteristic of under-developed economies that have not attained food security – an important catalyst of economic growth) A small portion of the population relies on food aid.[citation needed] Industry and manufacturing is the smallest sector, accounting for 16% of GDP. The service, industry and manufacturing sectors only employ 25% of the labour force but contribute 75% of GDP.

Question:
What was East and Central Africa's economy boosted by?

rapid expansion in telecommunication and financial activity