Fundamental reason for this was Russia’s under-developed economy, which was mostly agricultural – in fact until the mid-1800s it was almost entirely agrarian, with only minimal manufacturing or industry. <span> Government incentives of the late 1800s instigated a sharp increase in industrial investment and manufacturing; French investors, attracted by government deals, cheap labour and tax breaks, had eagerly pumped money into Russia to construct factories and new mines. But even with this, Russia still tailed its western European neighbours by a long stretch.</span>
The American attitude shifted in favor of rights for Native Americans. This is based on "Polls showed that Americans believed in rights for Native Americans". Why it's not B is because it wasn't the polling that contributed to the act, but what the polls showed which is C.
The correct answer is A) prepare and approve the party's beliefs
At the party's convention, delegates gather to draft the party's platform for the Presidential election and eventually work their way to nominate their candidate for that year's Presidential election.