Which is the long form of “tu cepillo”? a. el cepillo vuestro b. el cepillo suyo c. el cepillo nuestro d. el cepillo tuyo

The long form of “tu cepillo” is:

Explanation:

Possessive pronouns establish a possessor-object relationship that is widely used in Spanish, depending on personal pronouns these may be:

How in the phrase "tu cepillo" is used a Possessive Adjective that owns to the personal pronoun "tú", the possessive adjective must be for that pronoun too, and how the noun "el cepillo" is male and singular, the correct possessive pronoun is "tuyo".

es is the right