Which of these sentences is correctly written and punctuated? keeping his active mind challenging roosevelt improved his stamp collection, and read books on american history, politics, and biography. to keep his active mind challenging, roosevelt improved his stamp collection, reading books on american history politics and biography. keeping his active mind challenged roosevelt improved his stamp collection reading books on american history, politics, and biography. to keep his active mind challenged, roosevelt improved his stamp collection and read books on american history, politics, and biography.

Read the excerpt from an argumentative essay on space exploration. we probably couldn’t go to all the stars because they’re too far away. it would take a long time to get there. the sentences need to be revised for this type of essay because they

It is true that prior to 1914 the united states often had been disturbed by events in other continents. we had even engaged in two wars with european nations and in a number of undeclared wars in the west indies, in the mediterranean and in the pacific for the maintenance of american rights and for the principles of peaceful commerce. but in no case had a serious threat been raised against our national safety or our continued independence. what is the theme of this excerpt? a. the responsibility for americans to avoid involvement in war.b. america’s history of international involvement.c. a new kind of threat to american security.d. america’s history as a peaceful nation.

The balance includes both the fees for service and the shipping charges. is this sentence incomplete or complete?