The development of the cell theory involved

a. different ideas from different scientists.
b. the efforts of one scientist.
c. work with computer models.
d. complete agreement among scientists.

Different ideas from different scientists because many worked behind it to complete the theory

The development of the cell theory involved different ideas from different scientists. 
According to Matthias Schleiden "all plants were made of cells".
Also,
According to Theodor Schwann "all animals were also made of cells".
And,
Rudolf Virchow says after his observation that cells only come from other cells.

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.