I am buying a gym membership for unlimited visits for a period of one month. I am paying $20 as an introductory special price on the 1st of the month. Which of the following is the correct classification ?

a.

Adhesion, Commutative, Instantaneous, Bilateral, Onerous

b.

Adhesion, Aleatory, Successive,Bilateral, Onerous

c.

None of the other options

d.

Adhesion, Aleatory, Instantaneous,Bilateral, Onerous

e.

Adhesion, Commutative, Successive,Bilateral, Onerous