Capital letters in the multiple choice exercises give away which word is the correct one
you should give all the options in lower case - this way the student will not know which word should come first in the sentence. Right now it is very easy to guess, especially if some sentences are only 1 word...!
I also think this is very annoying, but as course contributors we can't do anything about it, as Zmrzlina said – the wrong answers are randomly generated by Duo. I also don't think Duo staff reads the Swedish forums, but on the other hand if posts about this would be upvoted a lot in the general forums, they might be seen and considered.
All the courses I've seen do this. I REALLY wish they didn't. I know I've caught myself many times just automatically selecting the capitalized one without even reading the word. What's the value in that?
Oh developer/user divide - it really ought to be trivial for a DuoLingo developer to apply a simple function to each of the sentences in order to capitalize their first words before they are presented in those multiple choice lists. A single line of code would most likely do the trick.
I find it annoying too. But I always try to think of the sentence myself, first, before looking at the potential answers. That seems to work well for me insofar as retention is concerned.