"We have also helped prevent millions of new infections worldwide, including in more than 1,5 million babes of HIV-positive mothers who were born free of HIV

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.

d

explanation:

d) a week

because the land run of 1889, although not without precedent in the history of the west, further, their men were aboard the first trains, ready to jump off and begin staking their claims. oklahoma city, edmond, and guthrie were all so affected.

number 1 is a)