What event inspired u. s. sentiment to turn negative towards mexico, even leading some to refer to mexico as “soviet mexico”?

a. a movement to reclaim oil reserves in mexico from u. s. companies
b. a mexican revolution inspired by the writings of marx and philosophy of lenin c. foreign investment and support for the mexican government which was primarily coming from russia
d. the publication of a popular sequel to marx's communist manifesto, written by the leader of mexico