Which sequence of control messages is used in MACAW for a successful data transmission?

Select one:

a$.$ RTS $->$ DS $->$ DATA $->$ ACK

b$.$

RTS $->$ CTS $->$ DS $->$ DATA $->$ ACK

c$.$

RTS $->$ CTS $->$ DATA $->$ NAK

d$.$

RTS $->$ CTS $->$ DATA $->$ ACK