question: participants at the conference will be both experts and civil servants from eu countries, candidate countries and eea countries.
Capitalize this past sentence correctly.
A: Participants at the conference will be both experts and civil servants from EU countries, candidate countries and EEA countries.

question: all in all, mobile binary options are the perfect compliment to your trading style, providing instant information on a convenient platform to make the best trades.
Capitalize this past sentence correctly.
A: All in all, mobile binary options are the perfect compliment to your trading style, providing instant information on a convenient platform to make the best trades.

question: 12:10 and have ye not read this scripture; the stone which the builders rejected is become the head of the corner:
Capitalize this past sentence correctly.

A: 12:10 And have ye not read this scripture; The stone which the builders rejected is become the head of the corner: