The correct answer is: B. micro-blogs
A short message service (SMS) is a text messaging service component of most telephone, internet, and mobile device systems. SMS is a text-only service, typically of up to 160 characters long, that can be sent to and from mobile phones. SMS messages can also be sent to and from email addresses.
Mini-blogs, micro-blogs, and nano-blogs are all types of blogs that are shorter than traditional blogs. Mini-blogs are typically 500 words or less, micro-blogs are typically 140 characters or less, and nano-blogs are typically 100 characters or less.
Mini-blogs are often used to share quick updates on a person’s life or to provide commentary on current events. Micro-blogs are often used to share links to articles or videos, or to ask questions and get feedback from others. Nano-blogs are often used to share quick thoughts or ideas.
SMS is a more traditional form of communication than mini-blogs, micro-blogs, and nano-blogs. SMS messages are typically sent to and from mobile phones, while mini-blogs, micro-blogs, and nano-blogs are typically accessed through a web browser. SMS messages are also typically shorter than mini-blogs, micro-blogs, and nano-blogs.