Question

the oneida community and brook farm were both established when?
the 1890s
the 1810s
the 1840s

Explanation:

The Oneida Community was established in 1848, and Brook Farm was established in 1841. Both fall within the 1840s. The 1890s and 1810s do not align with their establishment timelines.

Answer:

the 1840s (the option with "the 1840s")