Janka made a loaf of bread that did not rise. what was likely the cause of her dough not rising correctly?
the rising area was too warm
her yeast was expired
she used too much sugar
her flour was too low in gluten
her flour was too weak

her yeast was expired

Explanation:

Bread yeast is a living organism. Over time, it loses its potency and ability to make dough rise. Yeast packaging has an expiration date and it is best to use it prior to this date.  If dough is made with expired yeast, it is possible to rescue the slow rising dough by using a new package of yeast.