Someone erased my answer, I don't appreciate that disrespect...even if I may be wrong that is not right so i will re-put my answer back on here.
Answer: has
My friend, along with her sisters has lived in San Antonio for over 10 years.
Explanation: The definition of Have is, Have: Used with a past participle to form the perfect, pluperfect, and future perfect tenses, and the conditional mood. Ex.("I have finished")
The definition of Has is, Has: Be certain or inevitable to happen or be the case. Ex.("there has to be a catch")
I also Included Examples...Done
Please do NOT EVER take down someone's answer it is very disrespectful