Question: When was reinvent the toilet launched
Answer: In 2011, the foundation launched a program called "Reinvent the Toilet Challenge" with the aim to promote the development of innovations in toilet design to benefit the 2.5 billion people that do not have access to safe and effective sanitation.
A single-select problem: Is the question answered in a satisfactory fashion?

Available choices: 1. yes. 2. no.
1.