Countries, US States, Capitals, Elements, 100 Most Common Words: A ≈ B + C

The letters of answer A are almost the same as the ones of answers B and C put together. You are shown the letters that appear both in A and in B + C. So:
1) guess 'A' by anagraming the common letters and adding at most 1 extra letter
2) anagram the blue letters of A to find B and the red ones to find C (note thatif B or C contain an extra letter, this is shown as a hint)
Note that if A has an extra letter, this is shown in black. B comes before C in alphabetical order