Answer: Option E, la bicicleta.
Explanation: We need to complete the sentence:
Me gusta ____________ porque me ahorro dinero.
And a rough translation of this is:
"I like_____ because i can save money"
The given options are:
A.
el auto
B.
el taxi
C.
el tren
D.
el metro
E.
la bicicleta
where the cheapest option is E, la bicicleta, or "The bicycle" in English.