Answer:
The right answer is bebe.
La señora bebe café con leche
The lady drinks coffee with milk
This sentence is written in present tense, therefore, the conjugation of the verb beber (to drink) in present with the 3rd person in singular is Ella bebe (she drinks).
This is because in this case La señora (The lady) is the personal pronoun ella (she).
The other options are not correct, because:
Lee and Leen mean to read in 3rd person singular and 3rd person plural, respectively. This action is not according to the context of drinking coffee.
Beben means to drink in 3rd person plural (they), and according to the sentence the subject La señora is She.