What does the letter 'c' mean to you?
a. It's the initial of someone I know and/or love.
b. It represents the speed of light in a vacuum, for example in the famous equation E=mc2.
c. It represents the constant of integration, necessary because the derivative of any constant function is zero.
d. It represents the number that comes before C++.
d. It represents cytosine, a nucleobase in DNA and RNA.
e. It is the chemical symbol for carbon.
f. It's a roman numeral.
g. It is a large body of saltwater.
h. It stands for Celsius, or centigrade.
i. It stands for Coulomb, the SI unit of electric charge.
j. It represents the third choice in this questionnaire, after choices a and b.
k. It was my favourite guest star on Sesame Street.
l. None of the above (please specify).