The correct answer is:
b) @holger80
d) @scipio
Both developed it according to their intro post found here
On a related topic, how come I had to wait 4 full days for a daily trivia! haha I really missed it! Thanks for all the effort put in this amazing project.
We had some days for different curation initiatives :P.. but yeah.. we are going to try and keep them steady even though it might mean doing more than 1 post a day ;) ! Thanks for your constant support!
Yeah can't wait to see more initiatives :D Keep that up!