Reading "The Kids Are OK" Ken W

Reading "The Kids Are OK" Ken W. Knight, Sarah E. M. Stephenson, Sue West, Martin B. Delatycki, Cheryl A. Jones, Melissa H. Little, George C. Patton, Susan M. Sawyer, Rachel Skinner, Michelle M. Telfer, Melissa Wake, Kathryn N. North, Frank Oberklaid
-According to the authors of "The Kids Are OK," the New Family Structures Study, which is cited as evidence that children do poorly when raised by gay or lesbian parents, is problematic because of which of the following methodological limitations?

A) The study examined twice as many heterosexual couple families as same-sex couple families
B) The authors of the study self-identified as homophobic and therefore biased
C) The study compared stable, heterosexual two-parent families with gay/lesbian families of any configuration
D) The study examined twice as many gay families as lesbian families