German Grammar-please help me clarify the reasons behind the answers

There are some sentences I do not understand from German grammar test.
It would be grate if you can clarify the reasons behind the answers. I did this because I need to take a test next month.

  1. Die Europäer werden rasch die Vorteile des neuen Geldes zu schätzen.....
    a) können b) wissen c) a d) sein

The answer is wissen

  1. Alle l8 Minuten in Deutschland ein Unternehmen zusammen.
    a) brecht b) brechen c) bricht d) bracht

The answer is bricht. However, as I found brecht and bricht mean break. Why bricht?

3.Verkautstörderung geplant und organisiert sein.
a) hat b) will c) weiß d) braucht

The answer is will.

Thank you for your help!

  1. 'etwas zu schätzen wissen' mean to appreciate something. The other two don't make sense, and are not grammatical because e.g. with 'können', 'zu' could not be used.

  2. 'bricht' is singular third person (er, sie, es), 'brecht' is the plural second person (ihr) form

  3. ''will geplant sein' means 'needs to be planned'. In this case, the lack of 'zu' before 'sein' shows you the answer must be a modal verb, and 'will' is the only one there

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