With no explanation, chose the best option from "A", "B", "C" or "D". we frequently have applied them to corporations involved in parent-subsidiary relationships. See, e.g., U.S.I. Properties Corp. v. M.D. Constr. Co., Inc., 860 F.2d 1, 7 (1st Cir.1988), cert. denied, 490 U.S. 1065, 109 S.Ct. 2064, 104 L.Ed.2d 629 (1989); Rodriguez v. SK & F Co., 833 F.2d 8, 9 (1st Cir.1987); Topp, 814 F.2d at 833-39; Lugo-Vina v. Pueblo Int’l, Inc., 574 F.2d 41, 43-44 (1st Cir.1978); de Walker v. Pueblo Int’l, Inc., 569 F.2d 1169, 1170-73 (1st Cir.1978). In this context, we have repeatedly held that, where there is no evidence that the integrity of the corporate form has been violated, the separate corporate identities of a parent and subsidiary should be honored when determining either one’s principal place of business. See U.S.I. Properties, 860 F.2d at 7 (<HOLDING>); Rodriguez, 833 F.2d at 9 (recognizing

A: recognizing separate corporate identity of subsidiary despite evidence that subsidiary was whollyowned by grandparent corporation shared all its officers and directors with grandparent was grossly undercapitalized and did not prepare its own budget construction requirements or policies and procedures
B: recognizing separate corporate identity of parent despite evidence that parent was alterego of its subsidiary and was being sued for acts of its subsidiary
C: recognizing separate corporate identity of parent despite evidence that parent consolidated its profits and losses with that of its whollyowned subsidiary in presenting parents financial reports to shareholders that subsidiary was considered a division of parent and that subsidiary accounted for 60 of parents and subsidiarys combined operations
D: holding that parent corporation could not be held liable for any acts of whollyowned subsidiary although boards of directors of the two corporations overlapped in all other respects corporation had not disregarded subsidiarys corporate separateness had not involved itself directly in management of subsidiary and had not otherwise dominated or controlled subsidiary
A.