A fast food company has gained the support of one major producer of voice assistant platforms. The company is only worried about how to manage payments since asking the client to enter credit card information makes the voice$-$based advantages get lost. What advice can you give them?

a$.$

Make use of a smart card for charging clients.

b$.$

Use the digital wallet technology.

c$.$

Back from using voice$-$based orders since they have failed in the past.

d$.$

Use wired transfer of cash.