Spellings

The correct spelling is "subsidiary" with 'di' and 'ary'. Option B is missing the 'i', Option C has 's' instead of 'd', and Option D has 'rr' instead of 'r'.

Harassment is spelled with double 's' and single 'r' (hara-ss-ment). Common errors include doubling the 'r' or misspelling the suffix -ment.

Contemporary is spelled con-em-por-ary with 'e' in the second syllable. The stress on the second syllable helps remember the 'e' placement.

Neighboring retains the 'e' before 'i' from the base word 'neighbor'. Adding '-ing' doesn't change the root spelling pattern.

Maintenance derives from 'maintain' but changes to 'ten' not 'tan' when adding '-ance'. This shift from 'ain' to 'en' is a common pattern in similar words.

Situation is spelled with 'u' after 'sit' (sit-u-a-tion). The 'u' is necessary for the correct 'choo' sound in the middle syllable.

Credible is spelled with 'i' after 'cr' and 'le' at the end (cred-i-ble). It follows the same pattern as 'credit', sharing the same Latin root.

Associated uses double 's' and 'i' after 'at' (as-so-ci-at-ed). The 'ci' combination is key - it's soft like 'sh' in this position.

Phenomena is the plural of phenomenon. The Greek root keeps 'oe' which creates the 'e' sound before 'n' (phe-nom-e-na).

Alignment drops the first 'l' from align when adding '-ment' (a-lign-ment). This is an exception to the usual rule of keeping consonant doubling.

Approximate uses double 'p' and single 'm' (ap-prox-i-mate). The stress falls on the second syllable, which helps remember the double consonant.

Satellite has double 't' and single 'l' (sat-el-lite). The 'll' is a common mistake - the word actually has just one 'l' in the middle.

Psychological begins with 'ps' from Greek (the 'p' is silent) and uses 'y' after 'p' (psy-chol-o-gi-cal). The 'ch' is hard like 'k'.

'Continuously' is the correct spelling - the adverb form of 'continuous'. The suffix '-ly' is added directly to 'continuous' without modifying the base spelling. Options A, B, and D incorrectly insert or change letters.

The correct spelling is "Questionnaire" with double 'n' and double 's' after 'io'. Option A misspells it with single 's', B omits the 'i' after 't', and D uses single 's' and single 'i'. The word comes from French 'questionnaire' meaning a list of questions.