B. tu piensas
c and d are talking to more than one person
a is talking about one person but it is refering he or she, el o ella
b is for you, tu
Answer:
<u>La bicicleta es cómoda</u>
Explanation:
Bicicleta (bicycle) is a female noun and it's written in singular.
Plural should be written like this: las bicicletas son cómodas.
