Final answer:
The incorrect statements from the guest speaker's presentation are that the Millennium Development Goals built on the Sustainable Development Goals and that the share of world population living in low-income countries has increased by 10% since the 1990s.
Step-by-step explanation:
Given the guest speaker's presentation, the following statement is incorrect: a. the Millennium Development Goals (MDGs) build on the work begun by the 17 Sustainable Development Goals (SDG)s. The correct relationship is the opposite; the SDGs build on the MDGs. The MDGs were set by the United Nations in 2000 with targets for 2015, which included goals such as universal primary education, reducing child mortality, improving maternal health, and combating diseases like HIV/AIDS and malaria. The SDGs were introduced later in 2015 with a focus on a wider range of issues and are to be achieved by 2030.
Statement b. is correct as private financing is indeed most effective for revenue-generating activities. Statement c. is also true as the share of the world population living in low-income countries has indeed decreased. Lastly, statement d. is incorrect as the share of the world population living in low-income countries has not increased by 10% since the 1990s.
Therefore, options e) both a) and d) are incorrect and f) both b) and c) are incorrect also contains inaccuracies as statement b) is correct and c) is not demonstrably false based on the provided options alone. The correct answer is e) both a) and d) are incorrect, considering the relationship between the MDGs and SDGs and the trends involving low-income countries' population shares.