What 19th century inventions probably most improved transportation in the united stated ? why ?

Ms. garcia and ms. ming are both sixth-grade english teachers. ms. garcia, a new teacher at the school, has additional certification in gifted education. ms. ming has been a certified english teacher for a number of years. ms. ming has been overheard in the faculty lounge making negative comments about ms. garcia's professional abilities and personal character. mr. daniels, the sixth-grade history teacher, has heard ms. ming making negative comments about ms. garcia on more than one occasion and he knows that these comments are false. he also knows that ms. ming has been angry that ms. garcia was asked to teach the advanced english class. this is a class ms. ming had expressed a desire to teach. he believes this contributes to her negativity toward ms. garcia. what should he do? * a. mr. daniels should do nothing because he is not directly involved in the disagreement. b. mr. daniels should discuss the situation with the principal because ms. ming is in direct violation of the code of ethics. c. mr. daniels should speak ms. ming and ask her to stop talking about ms. garcia. d. mr. daniels should talk to ms. garcia about letting ms. ming teach the class since she has seniority.