C the final solution positive 100%
Explanation:
After the 7 years war, Britain and its colonies suffered both political and econimical problems. Britain went into a HUGE debt.
If the options include Gandhi's death, one of them would be it.
The invention that effectively ended the era of the "long drives" of the late 19th century was barbed wire, which served both as a barrier and line of defense.
<h3>What is barbed wire?</h3>
Barbed wire is a special type of barrier composed of short clusters of short sharp spikes that limit the pass or movement.
These wires (barbed wire) can be used to separate or delimit a given field or even have functions associated with defense.
In conclusion, the invention that effectively ended the era of the "long drives" of the late 19th century was barbed wire, which served both as a barrier and line of defense.
Learn more about barbed wires here:
brainly.com/question/15833809
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