Its linking 2 closely related independent clauses.
I believe it’s D all of the above
Several people didn't agree with what trump has said and done. He's homophobic, racist, and against womens rights. He's let officers take black people's lives, tried to enforce stop and frisk, which is basically taking any black person off of the street and tossing them into jail, and hasn't taken the virus seriously. He's also calling global warming an expensive little hoax, which is completely wrong and upsetting. Biden, however, is in favor of LGBTQ+ rights, womens rights, and supports black men and women. He's letting a black, female woman to be his vice president, which is a massive step, as she's the first one.
Scientific discoveries allow several problems that threatened and even hindered our lives to be solved. This can be seen by the development of disease treatment, better forms of mobility, better forms of communication, greater access to entertainment, among other technologies that we can say that make our lives easy, increase our quality of life and allow maintenance of our life is more efficient.
However, scientific advancement promotes the strong exploitation of natural resources, which causes degradation of those resources that are essential for our existence. With degeneration increasingly efficient, we do not know what our lives will be like in the future, but we know it will be insecure because we cannot fight against the force of environmental imbalance.
