As per the passage, why did the President of Iran signed the agreement?

• A. The president had to sign the deal because of the pressure from the States and the country s population.
• B. The president had confidence that by signing the deal the sanctions over the country would be removed, thus improving the economy of the country.
• C. Signing of the deal would help the nation to export the oil and the nuclear weapons easily.
• D. Both (b) and (c)
• E. None of these