Final answer:
Available research indicates there are diverse and complex attitudes towards bisexual individuals, including discrimination experiences. It is noted that one supported claim related to the question is the existence of negative attitudes towards bisexuals by some within the gay and lesbian community.
Step-by-step explanation:
The question asks which of the research findings regarding attitudes toward bisexuals has been supported.
Research into sexual orientation and attitudes has shown that there is a diversity in how bisexual individuals are perceived and treated in society.
For instance, Sears and Mallory's analysis of General Social Survey data from 2008 revealed that a significant percentage of lesbian, gay, bisexual (LGB) respondents encountered sexual orientation-based discrimination, indicating stigma surrounding non-heteronormative orientations.
Moreover, historical and sociocultural contexts have contributed to various negative stereotypes and misconceptions about bisexual individuals, including but not limited to beliefs about their sexual behaviors and practices.
While the information presented does not directly support any of the specific claims listed in the question (i.e., attitudes towards monogamy, safe sex practices, or negative views held by gays and lesbians), it does highlight the complexity and diversity of attitudes towards bisexuals.
One claim that is commonly discussed in the literature is that some gay men and lesbians hold negative attitudes toward bisexuals.
These negative attitudes can sometimes be attributed to the belief that bisexuality is indecisive or that bisexuals are unwilling to fully identify with the lesbiangay community, leading to a phenomenon known as biphobia.