Which revision is punctuated correctly?

i have traveled to canada, mexico, england, france, and spain—five countries so far.

the five countries i have traveled to so far are: canada, mexico, england, france, and spain.

so far i have traveled: to canada, mexico, england, france, and spain.

so far i have traveled to: canada, mexico, england, france, and spain.

i have traveled to five countries so far: canada, mexico, england, france, and spain.

Plz asap read this sentence from paragraph 3 of the article. the boys and girls are merely asked to obtain the signatures of ten friends or relatives. how does the word "merely" affect the meaning of the sentence? a- it suggests that asking people to subscribe to the washington times is something negative. b- it implies that obtaining ten signatures is not a requirement for receiving a prize. c- it downplays the fact that to win the prize, children must ask people to subscribe to the washington times. d- it emphasizes that children receive the prize only if they obtain ten signatures.