Final answer:
The strictest kosher standards are referred to as Mehadrin. It is a level of kosher observance that seeks to exceed basic Jewish dietary law requirements, unlike Glatt Kosher, which relates specifically to beef, or Kosher Lite and Treif, which are less strict or non-kosher, respectively.
Step-by-step explanation:
The term for the strictest kosher standards is b) Mehadrin. Mehadrin refers to a level of kosher observance that adheres to the most stringent application of Jewish dietary laws. These standards are typically followed by individuals and communities who are rigorously observant and seek to go beyond the basic requirements set by traditional Jewish law.
Glatt Kosher is another term associated with strict kosher standards, but it specifically refers to the smoothness of the lungs in slaughtered animals and often denotes a higher standard of kosher beef. This term implies an absence of adhesions on the lungs but is not a term for the strictest standards overall. On the other hand, Kosher Lite is not an officially recognized term and might be used informally to describe a less strict observance of kosher law, and Treif refers to food that is not kosher at all.