The inability of either side to make significant advances in belgium and france led to question 7 options:
a. the use of tanks and machines guns
b. the construction of airfields
c. the construction and use of trenches
d. a decrease in the use of poison gas

Both sides constructed and used trenches.

Explanation:

for k12 users

in mcculloch v. maryland (1819) the supreme court ruled that congress had implied powers under the necessary and proper clause of article i, section 8 of the constitution to create the second bank of the united states and that the state of maryland lacked the power to tax the bank.

gibbons v. ogden, (1824), was a landmark decision in which the supreme court of the united states held that the power to regulate interstate commerce, granted to congress by the commerce clause of the united states constitution, encompassed the power to regulate navigation.

an era of negotiation.

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