Read the excerpt from Team Moon. So they came by the thousands—kids, really, twenty-somethings, a few in their thirties. No one knew for sure how to get to the moon, how to land, or get home. But their goal was clear-cut, and that was enough. That gave them purpose: a reason to puzzle out the problems and seek solutions rather than sleep.

Which sentence from the excerpt best identifies the problem?

So they came by the thousands—kids, really, twenty-somethings, a few in their thirties.
But their goal was clear-cut, and that was enough.
No one knew for sure how to get to the moon, how to land, or get home.
That gave them purpose: a reason to puzzle out the problems and seek solutions rather than sleep.

the sun warms our planet, and with the moon, creates the tides. the moon orbits the earth and in turn, the earth orbits the sun. because they appear to be the same size in the sky, the sun, earth and moon work together to create eclipses. when the moon is directly in between the earth and sun

even though there may be variations in human emotions over time, the poem “ a contribution to statistics” by wislawa symborska suggests that the only unchangeable characteristic is mortality.

the author poses a distinction between the approximate and non-approximate numbers which correspond to our need for certainty in life and the difficulty of achieving it. our efforts to measure the exact often fail because the world is not always clearly structured .the poem seems to imply   that the only thing that is certain and has an exact number is death.