Respuesta :
Answer:
It's in fact letter B.
Explanation:
It's been from the year of 1973 and on, when there was an oil price crisis when it led Government to start a real investigation and investment on sources not-based-on petroleum energy.

Answer:
It's in fact letter B.
Explanation:
It's been from the year of 1973 and on, when there was an oil price crisis when it led Government to start a real investigation and investment on sources not-based-on petroleum energy.