Which of the following statements is TRUE about Exxon Mobil's strategy and investments?

a$)$ Exxon Mobil is continuing to invest in its core oil and gas business.

b$)$ Exxon Mobil is withdrawing from the oil and gas business.

c$)$ Exxon Mobil is investing heavily in wind energy.

d$)$ Exxon Mobil has committed to reach net$-$zero emissions by $2025.$