One of the biggest challenges for the exploration and future colonization of space is the expense of launching materials from Earth. Current rocket propulsion technology makes launches very expensive. Every item launched into space must be considered carefully because the expense goes up with every extra pound of cargo.

This problem would be best solved with
A.
launching methods that are more cost-efficient and cargo made of lighter materials.

B.
launching methods that are more cost-efficient and cargo made of heavier materials.

C.
heavier, more durable rockets and launching methods that are less cost-efficient.

D.
heavier, more durable rockets and launching methods that are more cost-efficient.

cutting down of the rainforest

the answer is b. i did this test and got it right.

informed opinion on immigration policy and immigration reforms from the american pubic is not complicated but a nuance. most americans support secure borders and they are not happy that the national’s immigration system is broken. people think that immigrants that shoulder similar responsibilities like native americans should be able to become americans. in the recent polls, stats have shown that there is a good support for tenets of comprehensive immigration reform. for example, in recent polls concerning opinions on immigration reforms, voters want congress to act even if status quo has no support. immigration opponents suggest that latino and non-latino voters disagree and there is controversy in the issue of citizenship.the truth is that the issue is about its leadership and problem-solving aspect and not about immigration reform.the opponents of immigration reforms advocate for the promotion of two myths where the first one is that republican politicians have a choose on latino votes and the second one is that the path to citizenship for unrecorded immigrant is controversial among all this !