1. D determined
2. B pictured
Tone, in written composition, is an attitude of a writer toward a subject or an audience. Tone is generally conveyed through the choice of words, or the viewpoint of a writer on a particular subject. ... The tone can be formal, informal, serious, comic, sarcastic, sad, or cheerful, or it may be any other existing attitude.
Since 'next' is a time-order word, you need another.
'Then' is a time-order word. You are not stating a 'fact', nothing happened abruptly, or 'suddenly', and you aren't comparing anything, 'similarly'.
It strengthens the connection between the two lines.
