Will give brainliest if you can do this

Who did the first work in creating vaccines

    which of the following was anecological  result of european exploration from 1400 to 1800?   a.  increased trade with east asia      b.  the spread of epidemic diseases      c.  expansion of english territory      d.  the spread of christianity

The constitution limits the power of question 3 options: both the federal government and state governments only the federal government only state governments the supreme court