Which of the following statements shows a clear example of logos

a. former director of nasa, scott sherrit, admits that there are higher priorities for government spending than space exploration.
b. every year, our government funds nasa to the tune of $17.5 billion, while environmental conservation efforts receive only $12 billion.
c. do you want your grandchildren to know all about distant solar systems but be unable to safely drink the water or breathe the air here on earth?
d. i believe that it is time to shift spending from the outdated nasa program to more relevant issues, such as environmental conservation