The answer is:
B. suppression of local religious beliefs and practices
D. brutal working conditions for natives extracting natural resources
E. deforestation from the construction of railroads
When European countries colonize weaker countries using new imperialism ideologies, they would force the local people to adopt the religion and culture from their mother countries. This will lead to suppression of local religious beliefs and practices.
Mother countries would also made an effort to obtain economic benefit from the colonized countries as much as possible. This became the reason why deforestation and brutal working conditions exist in the colonies.