Answer:
B.contaba
Step-by-step explanation:
Remember that when you say an action that used to happen in spanish we use "aba" as the termination of the verb, if it is for the first, and third person in singular, if it is for the pliroan would be aban* and for teh second is abas.
IN this case you are telling that Glora used to tell you, or always used to tell you, so the correct form would be "Contaba"